. >> president obama also vowed to seek justice and promised boston would heal. >> boston is a tough and resilient town. so are its people. i'm supremely confident that bostonians will pull together, take care of each other and move forward as one proud city. >> the focus is, of course, on trying to find out who did this and why so far nobody has been detained. guys. >> thank you. >>> news of the attacks in boston sent people straight to twitter in many cases. we have one of the first pictures tweeted out from the scene to share with you now. the san francisco-based service reported the spike in service just minutes after the bombing. the first platform to report the news of the attack. several use the sight to post pictures of the scene and to let their family and friends know they are okay. law firm add new web page to help friends and family communicate with loved ones in boston. it's called google person finder. it allows others to let others know they're safe. you can find a link by going to ktvu.com. you can also share your condolences and thoughts on our ktvu channel 2 faceboo